/*
 * Copyright 2024 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package androidx.compose.runtime.snapshots

import kotlin.coroutines.CoroutineContext
import kotlinx.coroutines.ThreadContextElement

internal actual class SnapshotContextElementImpl
actual constructor(private val snapshot: Snapshot) :
    SnapshotContextElement, ThreadContextElement<Snapshot?> {
    actual override val key: CoroutineContext.Key<*>
        get() = SnapshotContextElement

    override fun updateThreadContext(context: CoroutineContext): Snapshot? = snapshot.unsafeEnter()

    override fun restoreThreadContext(context: CoroutineContext, oldState: Snapshot?) {
        snapshot.unsafeLeave(oldState)
    }
}
